1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/emacs-lisp/find-func.el b/lisp/emacs-lisp/find-func.el
index 6186577079e..c05167cc3c9 100644
--- a/lisp/emacs-lisp/find-func.el
+++ b/lisp/emacs-lisp/find-func.el
@@ -125,7 +125,7 @@ See the functions `find-function' and `find-variable'."
       (setq library (replace-match "" t t library 1)))
   (or (locate-file library
                    (or find-function-source-path load-path)
-                   (append (find-library-suffixes) ""))
+                   (append (find-library-suffixes) '("")))
       (error "Can't find library %s" library)))
 
 ;;;###autoload